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Re: st: Descriptive statistics - counting aspects of a variable


From   Nick Cox <njcoxstata@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Descriptive statistics - counting aspects of a variable
Date   Sun, 3 Jun 2012 16:06:33 +0100

I agree with Abhimanyu. Also if -XX- is a string variable, then

count if XX == 616

won't work. You need "616".

Nick

On Sun, Jun 3, 2012 at 3:55 PM, Abhimanyu Arora
<abhimanyu.arora1987@gmail.com> wrote:

> I guess you have to type in
> count if XX=="618A"
> since it is a string variable

> PS-Frankly, the phrase "stata not being able to tell" without the
> displayed output might be a bit hazy for users like me

On Sun, Jun 3, 2012 at 4:24 PM, Amal Khanolkar <Amal.Khanolkar@ki.se> wrote:

>> I have a variable XX that describes various diagnoses that my subjects might have. Diagnoses are coded using the usual ICD 8-10 codes. While most diagnoses are just numerical, some end with an alphabet, for e.g. 618A or 720H.
>>
>> I can ask Stata to tell me how many subjects in my dataset have diagnoses 618 by:
>>
>> count if XX==616
>>
>> However how do I find out how many have a diagnoses with numbers in combination with letters (like 618A). Stata isn't able to tell me using the 'count' or 'sum' commands as above.
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